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Northwest Africa 14993
Basic information Name: Northwest Africa 14993
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14993
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 174 g
Recommended:  Achondrite-ung    [explanation]

This is 1 of 128 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 20 Dec 2022
Writeup from MB 111:

Northwest Africa 14993 (NWA 14993)

(Northwest Africa)

Purchased: 2022

Classification: Ungrouped achondrite

History: Purchased by Ziyao Wang in 2022 from a Northwest Africa meteorite dealer.

Physical characteristics: Single stone with patches of black fusion crust. The exposed interior is a fragmental breccia with coarse light-green to cream-colored grains. Scattered oxidized metal grains are visible throughout.

Petrography: (A. Ross and C. Agee, UNM) Reflected light microscopy images give the approximate modal abundances: 80% olivine, 15% pyroxene, 1-2% troilite, with minor chromite, taenite, kamacite, silica, and schreibersite. No plagioclase detected.

Geochemistry: (A. Ross, UNM) Olivine Fa22.2±20.1, range Fa5.0-Fa81.8, Fe/Mn=44±7, n=13; low-Ca pyroxene Fs27.4±19.0Wo4.4±2.4, Fe/Mn=29±3, n=7; augite Fs7.9Wo42.9, Fe/Mn=17, n=1.

Classification: Ungrouped achondrite, peridotite breccia. Similar to NWA 12217, possibly paired with NWA 12562, NWA 12319, and NWA 13954.

Specimens: 21.5 g including a probe mount on deposit at UNM, Ziyao Wang holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2022
Mass (g):174
Shock stage:high
Weathering grade:low
Fayalite (mol%):22.2±20.1
Ferrosilite (mol%):27.4±19.0
Wollastonite (mol%):4.4±2.4
Classifier:C. Agee, UNM
Type spec mass (g):21.5
Type spec location:UNM
Main mass:WangZ
Comments:BAS-34; submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Qi Lv      
Ziyao Wang            

     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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